Un-verbose run_cperf so we get logs

Author: graydon

run_cperf

@@ -558,7 +558,7 @@ def parse_args():
                         default='smoketest')
     parser.add_argument("--verbose",
                         action='store_true',
-                        default=True)
+                        default=False)
     parser.add_argument("--quiet",
                         action='store_false',
                         dest='verbose')